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The <checkboxes> tag should be bound to an object (FormBackingObject? Simple command object?) that represents the whole list of available Newsletters with checkboxes checked by default, if the corresponding newsletter is in the user's list.

One last thing you have to do is implement the equals() method in your NewsLetter object, based on which the selected attribute will be populated & also the selected newsletters will be added to the user object on data binding.

logSelection still shows Movie and Garden, even when I select only Pets and Art. Any idea why? BTW: Where do I compose the model for the success view? Do I have to use onSubmit instead of doSubmitAction?